2001 GP1200R rear cyl seizure problem. (2nd time)

[chip]

they have lots of alcohol or just shit fuel down there (seadoo when thru this in early years)BUT if it were me would check crank index and pressure check seal (soap water test works well) we all know rear cylinder get's hell from twist

later cd

[geraban19]

they have lots of alcohol or just sh*t fuel down there (seadoo when thru this in early years)BUT if it were me would check crank index and pressure check seal (soap water test works well) we all know rear cylinder get's hell from twist

later cd

I really thank U guys for all the help due this problem.

[stockwatch]

Welcome Gera,
I hope we can help you with your problem. You will get bunches of questions and opinions. It would help if you can provide as much detail as possible.

Year/Boat?
Hours on engine since last failure?
When did it happen? What were you doing?
Water in hull?
Rear coupler plastic cover in place? WHAT SIGNIFICANCE DOES THIS HAVE TO OVERHEATING/LEAN PROBLEM?
Aftermarket flame arrestors? Water socks?
Oil Injected or Premix?
Fresh gas? How long in tank?
Have the carbs been inspected or rebuilt?
Has the engine been pressure tested?

Hydrotoys,

Rear coupler plastic cover in place? WHAT SIGNIFICANCE DOES THIS HAVE TO OVERHEATING/LEAN PROBLEM?

[bill cosca]

135 hi is to big for these engine the cil will fail again just these time will thake longes on the 135 jet
alcool on the gas will use smaller jets no biger
these is a timing isue the crank may be twisted few deg or the head was damage and have a hot spot and have a pre ignition
and i wont discharge the posibility of a damage crank bering if you pay atention on the picture look like the problem is in one of the ports no the otrers these is very comun on debree coming from the bering closer to these port and same time is so fine is very hard to see
increse the jet is like a patch not a cure

[jeffsntx]

Hydrotoys,

Rear coupler plastic cover in place? WHAT SIGNIFICANCE DOES THIS HAVE TO OVERHEATING/LEAN PROBLEM?

If the coupler cover is not in place the rear seal will leak. This leads to a lean condition, and seizure.

[jeffsntx]

Hydrotoys,

Rear coupler plastic cover in place? WHAT SIGNIFICANCE DOES THIS HAVE TO OVERHEATING/LEAN PROBLEM?

Double post

[dewzee1200]

Rear Seal LEAK ?

If the coupler cover is not in place the rear seal will leak. This leads to a lean condition, and seizure.

With the cover OFF - what would cause Rear Seal LEAK ?

Just curious TIA

[EricD]

Just an fyi you replied to post from 2007